Moldboard.



PATENTED APR. 23, 1907.

J. F. PARKER. MOLDBOARD. APPLICATION FILED JUNE 20,1906.

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MOLDIBOARD.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed June 20,1906. semi No. 322,596.

To all whom it may concern.-

Be it known that I, JOHN F. PARKER, a citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented new and useful Improvements in Moldboards, of which the following is a specification.

This invention relates to improvements in moldboards, and especially is designed to provide means whereby a half-pattern may be used and accomplish the same result as was formerly done by using a full pattern.

In the drawings herewith accompanying and forming part of this application, Figure 1 is a bottom plan view of my improved moldboard. Fig. 2 is a longitudinal section showing the flask and core in position. Fig. 3 is an end view of the moldboard. Fig. 4 is a detail showing the manner of attachin the flask to the moldboard, and Fig. 5 is a detail of one of the movable clamps.

Same letters of reference refer to like parts in all the figures.

In said drawings, a. is a flask, and b is the half-pattern.

c c are adjustable clamps moving on a central groove 0 in the moldboard n. These clamps are adapted to be moved backward and forward in the groove and to be so po sitioned that they may receive the dowelpins m in the pattern I). These clamps are held against displacement by means of wash ersf, bolts h, and nuts g. The moldboard is also provided with further clamps d, adjustable in the central groove 0 of the moldboard, so as to receive the flask-pin e. The clamp d is also provided with a washer f, bolt h, and nut g. This clam is limited in its work to the flask alone an is prevented from moldboard, the dowels in the pattern being fitted in the opening in the movable clamps. The nowel-flask is then placed in position on the moldboard and held. by the flask-pin e. 5

The flask is then rammed up. After this process the flask is reversed, the moldboard removed, and the pattern drawn from the nowel-flask. The pattern is then replaced on the moldboard, and a cope-flask guided by the flask-pin c is placed in position on the moldboard and rammed up. The board is then removed, as before, and the pattern drawn out of the cope-flask. The cope-flask is then dropped on the nowel-flask and held by pin 6, and the mold thus obtained is exactly the same as if one-half had been in the cope and the other in the nowel.

The advantages of this improved moldboard are that it obviates the use of whole patterns, reducing to a considerable extent the cost of pattern-making, and, further, does away with the use of a number of moldboards, the longitudinal slots and the clamps sliding therein allowing patterns of various sizes to be used on the same board.

Having thus described my invention and its use, I claim 1. A moldboard having a longitudinal groove therein, adjustable pattern-holding clamps provided with sockets adapted to move in said longitudinal groove, means for holding said clamps in any desired position, holding-clamps to receive the flask-pins and means for limiting the movement of said flask-pin-receiving clamps.

2-. A moldboard having a longitudinal groove extending therethrough, cleats on the bottom thereof, holding-clamps provided with sockets adapted to move in said longitudinal slots and adapted to be adjusted to any required size of pattern, movable clamps for receiving the flask-pin and means for holding said clamps in position.

In testimony whereof I have signed my name to this specification, in presence of two witnesses, this 16th day of June, 1906;

JOHN F. PARKER.

In presence of NATHAN CLIFFORD, ELGIN O. VERRILL. 

